A cat in heat: the noise, the behaviour, and what to do

A cat in heat is not ill, in pain or misbehaving. She is broadcasting. Here is what is happening, how long it lasts, and how to get the household through it.

The first heat usually arrives unannounced, somewhere between five and nine months of age. One evening your kitten is herself; the next she is yowling at the windows, rolling across the floor and stropping every piece of furniture you own. It is dramatic, it is loud, and it is completely normal.

What you are watching is oestrus: the fertile window of a reproductive cycle that will repeat every two to three weeks from spring to autumn until she mates, is spayed, or the season ends. Understanding the rhythm makes the noise easier to live with, and makes the long-term decision clearer.

The signs, decoded

Heat behaviour is unmistakable once you have seen it, but the first time it can be mistaken for pain or illness. The classic signs:

• Calling: a loud, insistent yowl, deeper and more urgent than her normal voice, often worst at night.
• Rolling and rubbing: throwing herself onto the floor, writhing, and rubbing her cheeks and flanks on furniture, door frames and you.
• Lordosis: when stroked along the back, she drops her front end, raises her rear, deflects her tail to one side and treads with her back feet. This is the mating posture, and it confirms a heat beyond doubt.
• Restlessness and affection: pacing, an unusual neediness, and attempts to escape through any door or window that opens.
• Marking: some queens spray small amounts of urine, rich in the pheromones that advertise her status.
• Reduced appetite: many cats eat noticeably less for a few days.

What you should not see is blood. Unlike dogs, cats rarely bleed visibly in heat. Bloody or coloured discharge is not a heat sign and needs a vet.

How the cycle actually runs

Cats are seasonal, polyoestrus breeders: in the natural daylight pattern they cycle repeatedly from early spring to autumn, taking a break in winter. Indoor lighting can stretch the season in both directions. The phases:

Two quirks matter. First, cats are induced ovulators: they release eggs in response to mating, not on a schedule. Second, an unmated queen simply loops, heat after heat, for months. There is no natural end to the season except daylight and time.

Getting through it: the practical week

You cannot switch a heat off, but you can take the edges off. The tracker below reads her signs and timings and tells you what stage she is likely in; the routine that helps most households is this one.

1. 1Lock down the exits first. A queen in heat is an escape artist with one goal. Check windows, cat flaps and balcony doors, and warn everyone in the house.
2. 2Play her out in the evening. Two or three hard wand-toy sessions before bed burn off restlessness and reliably reduce night calling.
3. 3Offer warmth. A warm, low-sided bed or a wrapped heat pad in her favourite spot settles many queens noticeably.
4. 4Keep the litter tray immaculate. Stress plus a dirty tray is how marking habits start.
5. 5Leave her alone when she wants it. Extra affection is welcome when she asks; forced handling when she is wound up earns scratches.
6. 6Do not punish the calling. She is not being difficult; she is being a cat. Punishment adds stress and changes nothing.

She is not giving you a hard time. She is having a hard time, in surround sound.

What not to do

• Do not let her out to get it over with. She will find a mate, and pregnancy is possible from her very first heat, as early as four months old.
• Do not use hormonal suppressants from a pet shop without veterinary guidance. The injection and tablets carry real risks, including uterine disease, when used repeatedly.
• Do not assume a quiet heat means a missed one. Some queens run silent heats with almost no signs.
• Do not let an intact tom near her even for a moment. Cats mate quickly and determinedly.

The permanent answer: spaying

Spaying ends the cycling entirely, and with it the calling, the escape attempts and the pregnancy risk. The health case is strong: spayed females cannot develop pyometra, a life-threatening womb infection that affects a significant share of entire queens as they age, and early spaying sharply reduces mammary cancer risk. Most vets recommend spaying at around four to six months, before or shortly after the first heat, and it can be done between heats at any age. Typical cost across Europe runs roughly 100 to 250 EUR depending on the practice and region.

If you are not planning to breed, deliberately and with a vet's oversight, spaying is kinder than years of frustrated seasons. There is no health argument for a first litter; that is a myth.

Verdict by household

Indoor kitten, first heat: manage this one with play and patience, and book the spay for the quiet gap after it ends. One heat is usually all the convincing anyone needs.

Indoor-outdoor adult: keep her in for the duration, no exceptions, and treat this as the prompt to spay. Outdoor access in season is a pregnancy in waiting.

Multi-cat home with an intact male: separate them completely for the entire heat, behind solid doors. Determined cats defeat baby gates and good intentions.

Considering breeding: speak to your vet before the decision, not after the mating. Responsible breeding starts with health screening, and accidental litters help no one.

When to call your vet

Call promptly if you see any vaginal discharge, especially pus or blood; if a heat runs past ten days without a break; if she becomes lethargic, stops eating entirely or develops a swollen, painful abdomen weeks after a heat, the classic picture of pyometra, which is an emergency. Call too if a spayed cat starts showing heat behaviour, which can indicate a retained piece of ovarian tissue that needs attention.

And call simply to book the spay. It is the appointment that makes every other section of this article unnecessary.